# SPDX-License-Identifier: Apache-2.0

# Adapted from
# https://github.com/vllm-project/vllm/blob/v0.9.1/vllm/model_executor/layers/quantization/__init__.py
#
#
# Copyright 2025 Huawei Technologies Co., Ltd.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from vllm.model_executor.layers.quantization.base_config import (
    QuantizationConfig)

from vllm_mindspore.utils import is_native_model_backend

QUANTIZATION_METHODS: list[str] = list()


def get_quantization_config(quantization: str) -> type[QuantizationConfig]:
    if not is_native_model_backend():
        return
    if quantization not in QUANTIZATION_METHODS:
        raise ValueError(f"Invalid quantization method: {quantization}.")

    method_to_config: dict[str, type[QuantizationConfig]] = {}
    return method_to_config[quantization]
